Question

A cube has edges measuring 5 inches. Find the surface area of the cube.

5 inches
102 square inches
100 square inches
150 square inches
105 square inches
С
d

Answer 1

150 square inches

Explanation:

The surface area of the cube is

`S_A=A_1+A_2+A_3+A_4+A_5+A_6`

but it's a cube so all the areas are the same

`S_A=6A_1`

and the area of

`A_1=l^2`

`l=5\\\\A_1=5^2\\\\A_1=25`

so the surface area is

`S_A=6(25)\\\\S_A=150`square inches

Answer 2

150 square inches

Explanation:

The surface area is the exposed area, which would be 6 sides with an area of 25 and 25x6 is 150